innocents, enslaving that many women. the goal has to be to dismantle them. >> if we're going to deal with the problem of isil, isis, the islamic state, we have to deal with it right across the board. as i've argued, that deals with at home, stopping foreign fighters going to fight. making sure we're secure. it involves a new iraqi government. it also involves, i would argue, the same thing in syria that we need in iraq. just as we need in iraq what plur ris tick government that can represent all of the people of that country, so in syria we need a transition to a government that can represent all of the people in that country and stop brutalizing them. >> so more troubling images offer evidence into the new brutality of isis. a mass grave found in northern iraq is believed to contain the bodies of 15 shiite truck drivers killed by militant fighters.